WO2006013980A1 - 受信システム - Google Patents
受信システム Download PDFInfo
- Publication number
- WO2006013980A1 WO2006013980A1 PCT/JP2005/014448 JP2005014448W WO2006013980A1 WO 2006013980 A1 WO2006013980 A1 WO 2006013980A1 JP 2005014448 W JP2005014448 W JP 2005014448W WO 2006013980 A1 WO2006013980 A1 WO 2006013980A1
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- WIPO (PCT)
- Prior art keywords
- reception
- frequency
- demodulation
- intermediate frequency
- receiving
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
- H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
Definitions
- the present invention relates to a receiving system for receiving a plurality of broadcast Z communication media.
- An example of a receiving system that receives a plurality of broadcast Z communication media is a receiving system for a mobile body such as a vehicle.
- this type of reception system in order to receive or transmit broadcast media and communication media such as ETC, GPS, radio wave beacon, and mono broadcast, it is common to have a separate antenna and receiver for each media. (See Patent Document 1).
- Patent Document 2 Non-Patent Documents
- Patent Document 1 Japanese Patent Laid-Open No. 7-154278
- Patent Document 2 JP-A-7-106997
- Non-Patent Document 1 “Sharp Technical Report”, No. 78 ⁇ December 2000, p. 41-44
- An object of the present invention is to provide a receiving system that is low in cost and excellent in productivity by using a common circuit configuration and reducing the number of installations.
- a first aspect of the present invention provides at least one antenna device having frequency characteristics capable of receiving radio waves from a plurality of reception media, and a received radio wave received by the antenna device.
- Converter device that converts the signal into a common intermediate frequency signal and a decoding Z decoding circuit for each reception medium.
- the intermediate frequency signal that is also output by the converter device is output to the reception medium selected by the system.
- a receiving system comprising: a decoding Z decoding device that supplies a predetermined corresponding demodulation Z decoding circuit, wherein the converter device and the demodulation Z decoding device are connected by a single communication medium. is there.
- a second aspect of the present invention provides at least one antenna device having frequency characteristics capable of receiving radio waves from a plurality of reception media, and an intermediate frequency signal in which received radio waves received by the antenna device are preset.
- a converter device that converts and outputs to the tuner z demodulation Z decoding circuit for each reception medium, and outputs the intermediate frequency signal output from the converter device to the predetermined tuner corresponding to the reception medium selected by the own system.
- a receiving system characterized by comprising a tuner and a demodulating Z decoding device for supplying to a Z demodulating Z decoding circuit, and connecting the converter device and the tuner 'demodulating Z decoding device with a single communication medium There is to do.
- a third aspect of the present invention provides at least one antenna device having frequency characteristics capable of receiving radio waves from a plurality of reception media, and an intermediate frequency signal in which received radio waves received by the antenna device are set in advance.
- a converter device that converts the signal into a signal and outputs a demodulation Z decoding circuit for each reception medium. After the frequency conversion of the intermediate frequency signal output from the converter device into a frequency suitable for the demodulation process, the system selects A tuner 'demodulation Z decoding device to be supplied to the predetermined demodulation Z decoding circuit corresponding to the reception medium is provided, and the converter device and the tuner' demodulation Z decoding device are connected by a single communication medium.
- Another object of the present invention is to provide a receiving system characterized by the above.
- converting to a predetermined intermediate frequency signal means converting to a preset intermediate frequency signal or converting to a common intermediate frequency signal regardless of the reception medium.
- FIG. 1 is a block diagram showing a configuration of a receiving system according to the first embodiment.
- FIG. 2 is a block diagram showing a configuration of a receiving system according to the second embodiment.
- FIG. 3 is a block diagram showing a configuration of a receiving system according to a third embodiment.
- FIG. 4 is a block diagram showing a configuration of a receiving system according to the fourth embodiment.
- FIG. 5 is a block diagram showing a configuration of a receiving system according to a fifth embodiment.
- FIG. 1 is a block diagram showing a configuration of a receiving system according to the first embodiment.
- the reception system 10 includes an antenna device 100, a converter device 110, and a demodulation Z decoding device 130.
- the antenna device 100 and the comparator device 110 are connected by an antenna cable 120
- the converter device 110 and the demodulation Z decoding device 130 are connected by an IF signal cable 140 as a communication medium. Yes.
- the antenna device 100 is an antenna having a wideband frequency characteristic capable of receiving radio waves from a plurality of reception media.
- the antenna device 100 receives radio waves of GPS, radio beacons, and ETC power. Make it possible.
- the converter device 110 includes a band variable filter 111 (first selection unit), a gain variable amplifier 11 2 (first amplification unit), a first mixer 113, a first IF amplifier 114, a local oscillator 115, and a PLL channel selection circuit. 116 (the first conversion means).
- the band variable filter 111, the gain variable amplifier 112, and the PLL channel selection circuit 116 are supplied with a reception media Z frequency control signal from a control circuit (not shown).
- This reception medium Z frequency control signal is a signal for selecting the reception medium selected by the own system and its reception frequency.
- the band characteristic of the band variable filter 111 is controlled by this reception medium Z frequency control signal, and the input received radio wave is selected in a frequency band corresponding to the reception medium selected by the own system.
- the gain characteristic of the variable gain amplifier 112 is controlled by the reception medium Z frequency control signal, and the received radio wave that has passed through the band variable filter 111 is amplified with a gain according to the reception medium selected by the own system.
- the output is controlled by the reception media Z frequency control signal so that the oscillation frequency generated by the local oscillator 115 becomes a frequency tuned to the frequency to be selected.
- the mixer 113, the first IF amplifier 114, the local oscillator 115, and the PLL channel selection circuit 116 convert the frequency of the received radio wave and output it as a common (same frequency) intermediate frequency signal.
- the intermediate frequency signal output from the converter device is appropriately referred to as a primary IF signal.
- Demodulation Z decoding device 130 includes BPF (bandpass filter) 131 (second selection means), amplifier 13 2 (second amplification means), second mixer 133, local oscillator 134 (above, frequency conversion means), It is composed of a switching circuit 135 (switching means), a GPS demodulation Z decoding circuit 136, a radio wave beacon demodulation Z decoding circuit 137, and an ETC demodulation Z decoding circuit 138.
- BPF bandpass filter
- amplifier 13 2 second amplification means
- local oscillator 134 above, frequency conversion means
- It is composed of a switching circuit 135 (switching means), a GPS demodulation Z decoding circuit 136, a radio wave beacon demodulation Z decoding circuit 137, and an ETC demodulation Z decoding circuit 138.
- the BPF 131 the intermediate frequency signal output from the converter device 110 is selected in a predetermined frequency band.
- the amplifier 132 amplifies the intermediate frequency signal that has passed through the BPF 131 with a predetermined
- the second mixer 133 and the local oscillator 134 frequency-convert the intermediate frequency signal that has passed through the amplifier 132 into a frequency suitable for the subsequent demodulation process.
- the switching circuit 135 is supplied with the reception media Z frequency control signal described above from a control circuit (not shown). By this reception media Z frequency control signal, the output of the switching circuit 135 is switched to a predetermined demodulation Z decoding circuit (136 to 138) corresponding to the reception media selected by the own system.
- a reception medium Z frequency control signal for receiving the GPS radio wave is supplied to the band variable filter 111 and the variable gain amplifier 112.
- the GPS radio wave received by the antenna device 100 is input to the first mixer 113 via the band variable filter 111 and the variable gain amplifier 112.
- the frequency of the GPS signal is converted into a predetermined intermediate frequency in accordance with the oscillation frequency supplied from the local oscillator 115.
- the oscillation frequency generated by the local oscillator 115 is controlled by the reception media Z frequency control signal input to the PLL tuning circuit 116, and the primary IF signal of the common frequency is output from the first mixer 113 regardless of the reception media. Is output.
- the primary IF signal output from the first mixer 113 is amplified by the first IF amplifier 114 and then sent to the demodulation Z decoding device 130 through the IF signal cable 140.
- the primary IF signal sent to the demodulation Z decoding apparatus 130 is input to the second mixer 133 via the BPF 131 and the amplifier 132.
- the frequency of the primary IF signal depends on the oscillation frequency supplied from the local oscillator 134. Converted to a signal. In this embodiment, since the primary IF signal of the same frequency is handled, the same oscillation frequency is always supplied from the local oscillator 134.
- the secondary IF signal output from the second mixer 133 is input to the switching circuit 135. In the switching circuit 135, the output destination of the secondary IF signal is switched by the reception media Z frequency control signal, and in this example, the output is output to the GPS decoding Z decoding circuit 136.
- the demodulation Z decoding circuit 136 for GPS demodulates and decodes the input secondary IF signal and outputs it as a digital data signal to the GPS system (not shown).
- the above-described units are controlled in the same manner by supplying a reception media Z frequency control signal corresponding to the selected reception media.
- the secondary IF signal output from the second mixer 133 is output to the radio wave beacon demodulation Z decoding circuit 137 or the ETC demodulation Z decoding circuit 138.
- variable bandwidth filter 111 and the variable gain amplifier 112 of the converter device 110 are connected to a BPF having a predetermined frequency band and a receiving amplifier having a predetermined gain, respectively. It can also be set as the structure replaced with.
- the circuit configuration of converter device 110 can be shared, low cost can be achieved.
- the converter device 110 and the demodulation Z decoding device 130 can be connected by a single IF signal cable 140, the antenna device 100 and the converter device 110 can be connected to a radio wave such as an automobile roof or a dashboard. It is possible to place the demodulating Z decoding device 130 in a place where it is easy to receive, and to place the demodulating Z decoding device 130 in a place near the operation panel. Further, it is possible to reduce the number of cable installations and improve productivity.
- a thin coaxial cable is used for the IF signal cable 140 by down-converting to a primary IF signal of several hundred MHz in the force converter device 110 having a reception frequency of several GHz. Even so, high frequency loss will not be a problem. Therefore, there is an effect that wiring, hole processing, rain countermeasure work, etc. become easier than before.
- the force shown in the example in which the antenna device 100 and the converter device 110 are configured as separate bodies is combined for each cable connecting the antenna device and the converter device.
- Wiring, hole processing, rain countermeasure work on mobile bodies and receivers Therefore, productivity can be improved by further reducing the number of constructions compared to the case of separate installation.
- FIG. 2 is a block diagram showing a configuration of a receiving system according to the second embodiment.
- the receiving system 20 includes a converter device 210 integrated with an antenna device, and a demodulation Z decoding device 230, and both devices are connected by an IF signal cable 140.
- Converter device 210 includes first antenna device 101, second antenna device 102, switching circuit 117 (first switching means), variable band filter 111, variable gain amplifier 112, first mixer 113, and first IF amplifier 114.
- the first antenna device 101 and the second antenna device 102 are antennas having frequency characteristics in different bands, respectively.
- the first antenna device 101 receives radio waves outside the ETC band
- the second antenna device 102 can receive an ETC band radio wave.
- the variable bandwidth filter 111, the variable gain amplifier 112, the PLL channel selection circuit 116, and the switching circuit 117 are configured to be supplied with a control circuit force reception medium Z frequency control signal (not shown).
- the switching circuit 117 switches the input to the antenna device that can receive the radio wave from the reception medium selected by the own system by the reception medium Z frequency control signal. Since the operations of the band-variable filter 111, the variable gain amplifier 112, and the PLL channel selection circuit 116 using the reception media Z frequency control signal are the same as those in the first embodiment, description thereof is omitted.
- the demodulation Z decoding device 230 has the same circuit configuration as the demodulation Z decoding device 130 of the first embodiment (FIG. 1), and in FIG. 2, the same reference numerals are given to the same parts as in FIG. In FIG. 2, the switching circuit 134 constitutes second switching means in the present embodiment.
- the switching circuit 117, the variable band filter 111, and the variable gain amplifier 112 receive the ETC radio wave for reception.
- Media Z frequency control signal is supplied.
- the input is switched to the second antenna device 102 by the received media Z frequency control signal.
- the ETC radio wave received by the second antenna device 102 is a variable band filter 111, a variable gain amplifier.
- the signal is input to the first mixer 113 via the step 112.
- the frequency of the ETC signal is converted into a predetermined intermediate frequency in accordance with the oscillation frequency supplied from the local oscillator 115.
- the oscillation frequency generated by the local oscillator 115 is controlled by a reception media Z frequency control signal input to the PLL channel selection circuit 116, and a primary IF signal having a common frequency is output from the first mixer 113.
- the primary IF signal output from the first mixer 113 is amplified by the first IF amplifier 114 and then sent to the demodulation Z decoding device 230 through the IF signal cable 140. Since the operation of the demodulation Z decoding apparatus 230 is the same as that of the first embodiment, the description thereof is omitted.
- the circuit configuration of converter device 210 can be shared, so that low cost can be achieved. Further, since the converter device 210 and the demodulation Z decoding device 230 can be connected by a single IF signal cable 140, the first antenna device 101, the second antenna device 102, and the converter device 210 can be connected to, for example, an automobile. Almost receive radio waves, such as roofboards, dashboards, etc., and make it possible to place the demodulator Z decoder 230 close to the operation panel. Can be improved. In this embodiment, since the first antenna device 101 and the second antenna device 102 are integrated with the converter device 210, wiring for the mobile body and the receiving device is performed for each cable connecting the antenna device and the comparator device. Compared to the first embodiment, which does not require drilling, rain countermeasure work, etc., the number of constructions can be further reduced and productivity can be improved.
- first antenna device 101 the second antenna device 102, and the converter device 210 may be separated and the two devices may be connected by an antenna cable 120 as in the first embodiment. .
- a thin coaxial cable can be used for the IF signal cable 140 by down-converting to a primary IF signal of several hundred MHz lower than the reception frequency. Efficient wiring, hole processing, rain countermeasure work, etc. There are fruits.
- the first antenna device 101 and the second antenna device 102 having frequency characteristics in different bands has been described.
- a wideband One antenna device 100 having frequency characteristics see Fig. 1
- the switching circuit 117 shown in FIG. 2 is not necessary.
- FIG. 3 is a block diagram showing a configuration of a receiving system according to the third embodiment.
- the receiving system 30 according to the present embodiment includes a converter device 310 integrated with an antenna device and a tuner 'demodulation Z decoding device 230, and both devices are connected by an IF signal cable 140.
- the converter device 310 has the same circuit configuration as the converter device 210 of the second embodiment (FIG. 2), and in FIG. 3, the same reference numerals are given to the same parts as in FIG.
- the switching circuit 117 is a reception medium to which a control circuit power (not shown) is also supplied.
- the input is switched to the antenna device that can receive the radio wave of the reception media power selected by the local system using the Z frequency control signal.
- the band characteristics in the band variable filter 111, the gain characteristics in the gain variable amplifier 112, and the frequency output from the PLL channel selection circuit 116 are controlled by the reception media Z frequency control signal. Then, an intermediate frequency signal converted into an intermediate frequency corresponding to the reception media is output from converter device 310.
- the tuner / demodulation Z decoding device 330 includes a switching circuit 331 (second switching means), BPF332—1 to 332—3, amplifiers 333—1 to 333-3, GPS tuner Z demodulation Z decoding circuit 334, electric It is composed of a wave beacon tuner Z demodulation Z decoding circuit 335 and an ETC tuner Z demodulation Z decoding circuit 336.
- the above-described reception media Z frequency control signal is supplied to the switching circuit 331 from a control circuit (not shown). By this received media Z frequency control signal, the output of the switching circuit 331 is switched to a predetermined BPF, amplifier, tuner Z demodulation Z decoding circuit corresponding to the received media selected by the own system.
- GPS tuner Z demodulation Z decoding circuit 334 the radio beacon tuner Z demodulation Z decoding circuit 335, and the ETC tuner Z demodulation Z decoding circuit 336 are the demodulation shown in the first and second embodiments.
- a z decoding circuit is added with a tuner function.
- the reception medium for example, when a radio wave beacon is selected as the reception medium, the reception medium for receiving the radio wave beacon to the switching circuit 117, the variable band filter 111, and the variable gain amplifier 112.
- a Z frequency control signal is provided.
- the subsequent operations are the same as those in the second embodiment.
- a primary IF signal having an intermediate frequency corresponding to the radio beacon is generated and sent to the tuner / demodulation Z decoding device 330 through the IF signal cable 140. .
- the primary IF signal sent to the tuner 'demodulation Z decoding device 330 is input to the switching circuit 331.
- the output destination of the primary IF signal is switched by the reception media Z frequency control signal.
- the output destination is output to the radio wave beacon tuner Z demodulation Z decoding circuit 335 via the BPF 32-2 and the amplifier 33-3.
- radio wave beacon tuner Z demodulation Z decoding circuit 335 the input primary IF signal is tuned and controlled by the frequency of the radio beacon, then demodulated Z decoded and output as a digital data signal to a radio beacon system (not shown).
- the circuit configuration of converter device 310 can be shared, low cost can be achieved. Since the converter device 310 and the tuner 'demodulation Z decoding device 330 can be connected by a single IF signal cable 140, the first antenna device 101, the second antenna device 102, and the converter device 310 are For example, it is possible to place radio wave on a car roof or dashboard where it can be easily received, and the tuner 'demodulation Z decoder 330 can be placed close to the operation panel. It can be reduced to improve productivity. In the present embodiment, since the first antenna device 101 and the second antenna device 102 are integrated with the converter device 310, wiring in the moving body and the receiving device is performed for each cable connecting the antenna device and the converter device. There is no need to perform hole processing, rain countermeasure work, etc., and the number of constructions can be further reduced as compared with the first embodiment to improve productivity.
- the first antenna device 101, the second antenna device 102, and the converter device 310 may be separated and the devices may be connected by the antenna cable 120 as in the first embodiment. .
- the switching circuit 117 by providing a plurality of input terminals in the switching circuit 117, it is possible to cope with antenna devices of different bands. Therefore, by adding these antenna devices, radio waves can be received in a wider band. It becomes possible.
- a thin coaxial cable can be used for the IF signal cable 140 by down-converting the primary IF signal for each reception medium to a frequency lower than the reception frequency, for example, several hundred MHz or less. Therefore, wiring, hole processing, rain countermeasure work, etc. will be easier than before.
- the first antenna device 101 and the second antenna device 102 having frequency characteristics in different bands has been described.
- a broadband antenna is used.
- One antenna device 100 having frequency characteristics can also be used. In this case, the switching circuit 117 shown in FIG. 3 is not necessary.
- FIG. 4 is a block diagram showing a configuration of a receiving system according to the fourth embodiment.
- Fig. 4 the same parts as those in Fig. 2 are given the same reference numerals.
- the receiving system 40 includes a converter device 410 integrated with an antenna device, and a tuner / demodulation Z decoding device 430. Both devices are connected by an IF signal cable 140. Has been.
- the converter device 410 has the same circuit configuration as the converter device 210 of the second embodiment (FIG. 2), and the same reference numerals as those in FIG. 2 indicate the same functional blocks.
- the switching circuit 117 switches the input to the antenna device that can receive the radio wave from the reception medium selected by the own system by the reception medium Z frequency control signal supplied by the control circuit power (not shown).
- the band characteristics in the band variable filter 111 shown in FIG. 4 the gain characteristics in the variable gain amplifier 112, and the frequency output from the PLL channel selection circuit 116 are controlled by the reception media Z frequency control signal, and are received in the reception media.
- the intermediate frequency signal converted to the corresponding intermediate frequency is output from the converter device 410.
- Tuner / Demodulation Z decoding device 430 includes a band-variable filter 431 (second selection means), a gain variable amplifier 432 (second amplification means), a switching circuit 433 (second switching means), a GPS tuner Z recovery Z decoding circuit 334, radio beacon tuner Z demodulation Z decoding circuit 335, ETC tuner This is composed of a Z-demodulation Z-decoding circuit 336.
- the variable bandwidth filter 431, the variable gain amplifier 432, and the switching circuit 433 are supplied with a control circuit power reception medium Z frequency control signal (not shown).
- the band characteristic of the band variable filter 431 is controlled by this reception medium Z frequency control signal, and the input intermediate frequency signal is selected in a frequency band corresponding to the reception medium selected by the own system.
- the gain characteristic of the variable gain amplifier 432 is controlled by the reception media Z frequency control signal, and the intermediate frequency signal that has passed through the band variable filter 431 is amplified with a gain according to the reception medium selected by the local system.
- the output of the switching circuit 433 is switched to a predetermined tuner Z demodulation Z decoding circuit (334 to 336) corresponding to the reception medium selected by the own system by the reception media Z frequency control signal.
- reception medium Z for receiving ETC radio waves to switching circuit 117, variable band filter 111, and variable gain amplifier 112 is provided.
- a frequency control signal is provided.
- the subsequent operations are the same as those in the third embodiment.
- a primary IF signal having an intermediate frequency corresponding to ETC is generated and sent to the tuner “demodulation Z decoding device 430 through the IF signal cable 140.
- the primary IF signal sent to the Z decoding device 430 is input to the switching circuit 433 via the band variable filter 431 and the gain variable amplifier 432 whose characteristics are controlled by the reception media Z frequency control signal.
- the output destination of the primary IF signal is switched by the reception media Z frequency control signal, and in this example, the output is output to the ETC tuner Z demodulation Z decoding circuit 336.
- ETC tuner Z demodulation Z decoding circuit 336 the primary IF signal is tuned and controlled at the ETC frequency, then demodulated Z decoded, and output to the ETC system, not shown as a digital data signal. .
- the circuit configuration of the converter device 410 and the filter and amplifier in the previous stage of the tuner 'demodulation Z decoding device 430 can be shared, so that the cost can be reduced. it can. Further, since the converter device 410 and the tuner 'demodulation Z decoding device 430 can be connected by a single IF signal cable 140, the first antenna device 101, the second antenna device 102, and the converter device 410 are For example, place it in a place where it is easy to receive radio waves, such as the roof of a car or a dashboard. Can be placed close to the operation panel, and the number of cable installations can be reduced to improve productivity.
- the first antenna device 101 and the second antenna device 102 are integrated with the converter device 410, wiring between the antenna device and the converter device for each mobile unit or receiving device, There is no need to perform hole processing, rain countermeasure work, etc., and the number of constructions can be further reduced as compared with the first embodiment to improve productivity.
- first antenna device 101 the second antenna device 102, and the converter device 410 may be separated, and the two devices may be connected by the antenna cable 120 as in the first embodiment. .
- a thin coaxial cable for the IF signal cable 140 by down-converting the primary IF signal for each reception medium to a frequency lower than the reception frequency, for example, several hundred MHz or less.
- a frequency lower than the reception frequency for example, several hundred MHz or less.
- the present embodiment an example using the first antenna device 101 and the second antenna device 102 having frequency characteristics in different bands has been described.
- a broadband antenna is used.
- One antenna device 100 having frequency characteristics can also be used. In this case, the switching circuit 117 shown in FIG. 4 is not necessary.
- FIG. 5 is a block diagram showing a configuration of a receiving system according to the fifth embodiment.
- the same parts as those in FIG. 5 are identical to FIG. 5 in FIG. 5, the same parts as those in FIG. 5.
- the receiving system 50 includes a converter device 510 integrated with an antenna device, and a tuner / demodulation Z decoding device 530. Both devices are connected by an IF signal cable 140. Has been.
- Converter device 510 has the same circuit configuration as converter device 210 of the second embodiment (FIG. 2), and the same reference numerals as those in FIG. 2 denote the same functional blocks.
- the switching circuit 117 switches the input to the antenna device that can receive the radio wave from the receiving medium selected by the own system by the receiving medium Z frequency control signal supplied by the control circuit power (not shown). Further, the band characteristics in the variable band filter 111 shown in FIG. 5, the gain characteristics in the variable gain amplifier 112, and the frequency output from the PLL channel selection circuit 116 are controlled by the reception media Z frequency control signal. As a result, the intermediate frequency signal corresponding to the received medium and converted to a frequency in a range that can be controlled by the tuner device described later of the tuner / demodulation Z decoding device 530 is output from the converter device 510. .
- Tuner / Demodulation Z decoding device 530 includes a variable bandwidth filter 531 (second selection means), a gain variable amplifier 532 (second amplification means), a second mixer 533, a local oscillator 534, and a PLL tuning circuit 53 5 (Frequency conversion means), switching circuit 536 (second switching means), GPS demodulation Z decoding circuit 136, radio beacon demodulation Z decoding circuit 137, ETC demodulation Z decoding circuit 138.
- the second mixer 533, the local oscillator 534, and the PLL channel selection circuit 535 constitute the tuner device described above.
- a reception media Z frequency control signal is supplied from a control circuit (not shown) to the band variable filter 531, variable gain amplifier 532, PLL channel selection circuit 535, and switching circuit 536.
- the band characteristic of the band variable filter 531 is controlled by this reception medium Z frequency control signal, and the input intermediate frequency signal is selected in a frequency band corresponding to the reception medium selected by the own system.
- the gain characteristic of the variable gain amplifier 532 is controlled by the reception media Z frequency control signal, and the intermediate frequency signal that has passed through the band variable filter 531 is amplified with a gain according to the reception medium selected by the local system.
- the PLL channel selection circuit 535 controls the output so that the oscillation frequency generated by the local oscillator 534 becomes a frequency tuned to the frequency of the input signal. Furthermore, the output of the switching circuit 536 is switched to a predetermined demodulation Z decoding circuit (136 to 138) corresponding to the reception medium selected by the own system by the reception media Z frequency control signal.
- the radio circuit beacon is received by the switching circuit 117, the variable band filter 111, and the variable gain amplifier 112. Receiving media Z frequency control signal is supplied.
- the subsequent operation is the same as that of the third embodiment.
- a primary IF signal of an intermediate frequency corresponding to the radio beacon is generated and sent to the tuner's demodulation Z decoding device 530 through the IF signal cable 140.
- the primary IF signal sent to the tuner / demodulation Z decoding device 530 is input to the second mixer 533 via the band variable filter 531 and the gain variable amplifier 532 whose characteristics are controlled by the reception media Z frequency control signal.
- the In the second mixer 533 the frequency of the primary IF signal is converted into a secondary IF signal having a frequency suitable for the demodulation process in the subsequent stage in accordance with the oscillation frequency supplied from the local oscillator 534.
- the oscillation frequency generated by the local oscillator 534 is controlled by the reception media Z frequency control signal input to the PLL tuning circuit 535, and the secondary mixer 533 outputs a secondary IF signal with a frequency corresponding to the radio beacon. Is done.
- the output destination of the secondary IF signal is switched by the reception media Z frequency control signal, and in this example, it is output to the radio wave beacon demodulation Z decoding circuit 137.
- the radio wave beacon demodulation Z decoding circuit 137 demodulates and decodes the input secondary IF signal and outputs it as a digital data signal to a radio beacon system (not shown).
- the circuit configuration of converter device 510 can be made common, and the tuner device in tuner / demodulation Z decoding device 530 (second mixer 533, local oscillator 534, PLL tuning) Since the circuit configuration of the circuit 535) can be made common, low cost can be achieved. Further, since the converter device 510 and the tuner “demodulation Z decoding device 530” can be connected by a single IF signal cable 140, the first antenna device 101, the second antenna device 102, and the converter device 510 are connected. For example, it is possible to place the tuner 'demodulation Z decoding device 530 close to the operation panel, such as on the roof of a car or dashboard, where it is easy to receive radio waves. It can be reduced to improve productivity. In the present embodiment, since the first antenna device 101 and the second antenna device 102 are integrated with the converter device 510, wiring and hole processing in the moving body and the receiving device are performed for each cable connecting the antenna device and the converter device.
- the first antenna device 101, the second antenna device 102, and the converter device 510 may be separated and the devices may be connected by the antenna cable 120 as in the first embodiment. .
- a thin coaxial cable for the IF signal cable 140 by down-converting the primary IF signal for each reception medium to a frequency lower than the reception frequency, for example, several hundred MHz or less.
- a frequency lower than the reception frequency for example, several hundred MHz or less.
- the broadband antenna One antenna device 100 having frequency characteristics can also be used.
- the switching circuit 117 shown in FIG. 5 is not necessary.
- reception media are not limited to these, for example, analog TV, D
- It may be a TV, DAB or mobile phone.
- the antenna device and the converter device can be connected to, for example, an automobile. It is possible to place the demodulator Z decoding device close to the operation panel at a place where it is easy to receive radio waves, such as roofs and dashboards, and to connect cables on mobile units and receiving devices. Productivity can be improved by reducing the number of processes such as wiring, hole processing, and rain countermeasure work.
- the antenna device when the antenna device is integrated with the converter device, wiring, hole processing, rain, etc. in the moving body and the receiving device are provided for each cable connecting the antenna device and the converter device. Since there is no need to take countermeasures, etc., the number of constructions can be further reduced to improve productivity.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-231468 | 2004-08-06 | ||
JP2004231468A JP2006050450A (ja) | 2004-08-06 | 2004-08-06 | 受信システム |
Publications (1)
Publication Number | Publication Date |
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WO2006013980A1 true WO2006013980A1 (ja) | 2006-02-09 |
Family
ID=35787258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/014448 WO2006013980A1 (ja) | 2004-08-06 | 2005-08-05 | 受信システム |
Country Status (2)
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JP (1) | JP2006050450A (ja) |
WO (1) | WO2006013980A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009139288A1 (ja) * | 2008-05-16 | 2009-11-19 | 三菱電機株式会社 | 通信装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04360319A (ja) * | 1991-06-06 | 1992-12-14 | Toshiba Corp | テレビジョン受像機用チューナ |
JPH0993152A (ja) * | 1995-09-25 | 1997-04-04 | Alps Electric Co Ltd | ダブルコンバージョンテレビチューナ |
JPH09186618A (ja) * | 1995-12-28 | 1997-07-15 | Sanyo Electric Co Ltd | ラジオ受信機 |
JPH09200070A (ja) * | 1996-01-12 | 1997-07-31 | Matsushita Electric Ind Co Ltd | 受信回路 |
JP2001148636A (ja) * | 1999-11-22 | 2001-05-29 | Matsushita Electric Ind Co Ltd | 高周波受信機 |
JP2001231033A (ja) * | 2000-02-17 | 2001-08-24 | Dx Antenna Co Ltd | 共同受信システム及びこれの端末用周波数変換装置 |
-
2004
- 2004-08-06 JP JP2004231468A patent/JP2006050450A/ja active Pending
-
2005
- 2005-08-05 WO PCT/JP2005/014448 patent/WO2006013980A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04360319A (ja) * | 1991-06-06 | 1992-12-14 | Toshiba Corp | テレビジョン受像機用チューナ |
JPH0993152A (ja) * | 1995-09-25 | 1997-04-04 | Alps Electric Co Ltd | ダブルコンバージョンテレビチューナ |
JPH09186618A (ja) * | 1995-12-28 | 1997-07-15 | Sanyo Electric Co Ltd | ラジオ受信機 |
JPH09200070A (ja) * | 1996-01-12 | 1997-07-31 | Matsushita Electric Ind Co Ltd | 受信回路 |
JP2001148636A (ja) * | 1999-11-22 | 2001-05-29 | Matsushita Electric Ind Co Ltd | 高周波受信機 |
JP2001231033A (ja) * | 2000-02-17 | 2001-08-24 | Dx Antenna Co Ltd | 共同受信システム及びこれの端末用周波数変換装置 |
Also Published As
Publication number | Publication date |
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JP2006050450A (ja) | 2006-02-16 |
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